Automatic telephone system for nonconsecutively numbered grouped lines



y 1, 1952 H. L. LESIGNE 2,602,122

AUTOMATIC TELEPHONE SYSTEM FOR NONCONSECUTIVELY NUMBERED GROUPED LINESFiled July 14, 1948 4 Sheets-Sheet 1 Fig. I.

can sum-ran CW1 LING 5714770 CONNECT/0N CIIPC'UI' c/umva CALLED STAT/0NMARKER MHRKER 551. E C TOR IN M57117 0 [ff/ll?! L 00/5 A561 GIVE July 1,1952 H. L. LESIGNE 2,502,122

AUTOMATIC TELEPHONE SYSTEM FOR NONCONSECUTIVELY NUMBERED GROUPED LINESFiled July 14, 1948 4 Sheets-Sheet 2 (UN/V5670? 60/ c'azwvacr/rva-0/?(0/7' II -I P06 rm s I df --I-.- rzvz I" I 2 3 4 .5 6

H. L. LESIGNE 2,602,122 AUTOMATIC TELEPHONE SYSTEM FOR NONCONSECUTIVELYNUMBERED GROUPED LINES July 1, 1952 4 Sheets-Sheet 3 Filed July 14, 1948lcolvmcrs OF BANK E II w IIII IIIIIIIIIII|IIIIIIIIIIIIIIIII III I LHHIII 1 F r- JIIAIII I L M a IT." w {-1 5 hI .IH. lill 1| 1L R W imw m.c a HI 5 m W W I w A 1 1 m M ,5 n m r m u a C I N am w v l I l Q I. A

a m n LIN w W mxfl a I! .m N m M n J 3 I M L m T? "m m i m u n "a b c de F I I I I I I I I I I I I I I I I I I I I I I Ir I" I I I I II II IIII II I I L [Myth 70f? Igl/E/V/F/ LOU/J LES/6N6 y 1, 1952 H. L. LESIGNE2,602,122

AUTOMATIC TELEPHONE SYSTEM FOR NONCONSECUTIVELY NUMBERED GROUPED LINESFiled July 14, 1948 4 Sheets-Sheet 4 fwd HECTOR zCO}! r--- ""1 F 14!:Pas/77006 1 5 5 7 9 11 cozy/W04 sw/ra/ c'ocz Mmewra/i l/E' /YAI 100/645.51am? MML M Patented July 1 1952 AUTOMATIC-TELEPHONE SYSTEM FOR Non-CONSECUTIVELY NUMBERED GROUPEDY U .i- IN Henri Lo'uis Lesigne, Vanves,France a'ssig'nor to Compa'gnie Industrielle des Telephones-Paris,

France, a French corporation Application July 14, 1948, Serial Nu.38,598 i In France July 11,194?

. 3 Claims.

My invention relates to special switching arrangements for automatictelephone systems having subscribers to whom a plurality of lines areassigned.

In automatic telephone or telegraph systems, the subscribers "generallyhave the possibility of using several lines -for sendlng and =receivingtheircalls. r i

It'is usual practice 'to' permit another subscriber to dial thesegrouped lines-oi one subscriber under a single listed number. the otherlines -of thegroup being, automatically andsuccessively explored whenthe first lines are busy, this; exploration continuing-until a free lineis found, and a calling subscriber: only gets the busy signal whenallthe lines of the group have been explored and f'und b'usy. v

It is also possible to-reachanyparticular desired line of the group,other than the first line,

without-exploring any :other. lines of the group,

dialiiig' it under its own number.

Arrange'meI- ts of thi's l ind permit .greatop erating flexi-bility,"but have the draw back of rec-1 1i ng the conse'cutive grouping togetherof all of -the lines of the-g'roup. The 'linesof thegronp must occupysuccessive positions. on .the corrnector, and-the. subscribers listednumber must be the firstline. of the series of itheg' roup, since, whenthis listed number is dialed, Iitmust cause the.. exploration ofthe..entire-..group. of lines, if necessary- -When given. subscriber,using. grouped lines,.';:finds it: necessary .to increase the number.otlalines his: group, he cannot be given the proper service if thenumberofl :the line. which follows the. last. number of. his grouphasgalready been assigned .toanothet subscriber; It thennecessary to.list: torgsuch a. subscriber; a. .separatenumber to :hedia'ledseparately .11. all of the lines in his consecutive group. are

An object of the present invention is to provide a circuit arrangementwhichv affords the same iacilities for. operation as the. knownarrangementsfloi the prior art; but does: not r e-- quire. that all ,ofthe-lines'.of"',a group assignedto' one particular subscriber, beassigned in a continuous run of successive numbers without. interruptionon the banks of the jfindiiigmem- The arrangement in accordancewith'the' present' invention-comprises arelay, which, when the firstline ie busy, causes the rotation o f theline findingimember; the linesblonging to onegiven desired called subscriber lbeing distinguished? bythe: fact that the. 3terminal cohtacts' corresponding to such lines on aselector band "re given a special polarity, which enables the connectorto detect them in passing around over the bank, and to pass, withoutstopping, over the lines which belong to other subscribers.

To the terminalcontact corresponding to the last line of a particularsubscriber, there is also applied a special polarity potential whichcauses the busy signal to b'elsent to the calling subscriberif the'lastlineis busy.

The invention will be understood from the fol- I lowing specificationand the accompanying drawings, wherein:- Y I 2 "Fig. 1 is block diagramof a known type of telephone system which uses a common maricingmultiple, to which type-of system the present invention may beiaippliedjl Fig. 2 is a block diagram of another knowntype of, telephonesystem with. separate individual marking devices .fcr-i each stage, towhich typed of system :the present invention may be appie Fig. 3 is. a.circuit. diagi'am'showing the'application of the present inventionvoigrouped i-ib scriber line control to theknown common-maneing multipletype of SystemoiPFig-L I;

Fig. 4 is a circuit diagram shewiiig 'ancther embodiment of theapplication-of the e'snt invention of grouped subscriber line control tothe known markingxmultip'letype of system oi Fig. 1, employing areducednumber'of controlwires; and r Fig; 5 is .a' circuit diagramshowing an enibcelimerrt of the application. oiltlie present ii'rrvention 0t .grouped .s'ubscriberx'line control to the knownindividual. marking rhultiple system of the type' shown in Fig. 2; intiorr of. them-groupie efiec't'ed z-hy iiieans oi the numerical:element'lreceiving the unit-digit;

Referring to Fig. 1, showing thebloclc diagramof' a. knowirtypezotautomatic telephoiie system, with common; marking mu DRI representsacaHiHg -subscrib'er who ca "reach" acalled sub scriberi DEls'by :meansof: a connecting circuit a. separate insulated battery individualto-eacliregister; in additionztos the 'regular' battery" of area theexchange, permits the use of a marking multiple common to all themarking devices. It is thus possible to eliminate special markingdevices which are individual for each stage. This separate individualinsulated battery of the L43 system, which is in addition to the regularbattery, is entirely insulated from ground, and its terminals haveseparate, ungrounded connections.

Fig. 2 shows the block diagram'for a known type of system with separatemarking devices, which is known as the R6 system. In Fig. 2, the callingsubscriber DR2 reaches the. :called subscriber DEZ, by means of adetecting circuit CCZ, and a selector-connector C02. The selector S2 isset in position by means of a marking device COCI, and theconnector-selector by means of a marking device 0002. These markingdevices are composed of a control switch which causes the rotation ofthe member to be set, and checks its position at each instant by meansof an as-' register, the elements of the connecting circuit which arenecessary to the explanation of the operation of the arrangementaccording to the present invention, and theconnector COI.

The control switch COC2 and the connector CO2 are shown in Fig. 5.

In thefollowing description, in describing relay circuits, .the letter.T preceding the reference number of a relay contact, designates acontact which is closed when the corresponding relay.

winding is energized with current, and the letter R. 'designatesthe.relay contact which is closed when the energizing current is cut offfrom the winding of this relay;

In assigning reference characters, the contacts of a relay aredesignatedby reference numerals consisting of the reference number ofthe relay followed by a single digit, as 23 designates the third contactof relay 2. x

In. the following description, the terms ground or earth, and I battery,respectively designate the positive pole and the negative pole of thegeneral or regular battery of the exchange,

and the signs and represent the positive pole and the negative pole ofthe separate battery insulated from ground and individual to eachregister, such as is used in the L43 type of system shownin Fig. 1.

Fig. 3 shows in more detail a connector which corresponds to theconnector COI shown in Fig. 1.

On the banks of this connector CO I only six positions have been shown,by their terminal contacts, and these positions have been numbered 1 to6, and it hasalso been assumed that position 1 represents the first lineof an assigned.

group of lines, and that the positions 2, 3, 4, correspond to otherlinesbelonging to the same consecutive groupof numbers, and thatposition 4 corresponds to the last consecutive line of this integralconsecutive group.. Ithas also been assumed that position 5 correspondsto a line which does not belong to this particular subscriber butbelongs to another subscriber, and that position 6 This leads 4corresponds to an isolated line which belongs to the particularsubscriber to whom the group is assigned, and is the last line assignedto this particular subscriber, who has positions 1, 2, 3, 4, andthat'beyond. position 6 there; are no other lines assigned to thissubscriber. ,1

Fig. 3 also shows the brushes of the selector SI of Fig. 1, and alsothose of the finder CE], and

, the connection relays, I, 2, of the connector COI.

Only those circuits of the register ERI are shown which are necessaryfor an understanding of the present invention.

In these, circuits, X5 and X6 are the numerical elementswhichrespectively receive the tens digit and the units-digit.

R. is the sequence switch or combiner and its actuating magnet, of whichthe contacts are shown as a'!, b1, 01, d'he'l, for position 7, and as608,128, c8, d8, e8, f8, for position 8.

Positions 1 to 6 have not been shown, since they correspond in thesequence switch or combiner R. to operations employed for the searchingof a connector, anddo not come within the scope of the presentinvention. The succeeding positions following position 8 have not beenshown.

I and 2 are the two connector relays. Relay I provides forthe.connection of, the connector brushes with the connecting circuit CCI.It is amarginal relay. It only operates when a current of sufficientintensity flows through its lower winding. Relay 2 operates .assoon'asthe connector is. engaged and shunts .bymeans of its contact 2! thebrush S on the winding of relay I.

In Fig. 3, the connection relay is shown at 3, at 4 is shown the relaywhich causes the rotation of the electors and connectors, at 5 is shownthe test relay, at 6 is shown'the control relay. at I is shown the relaycausing-the connection of the connector. I

In this figure-there areshown ,at8 and 9, the two relays designating inconnection with the banks b, c, d,-e, of numerical element X5, the

called line group in which the hunting is to take,

place. At I0 is shown the relay which differentiates the case of thegroupedlines of a subscriber having ,a plurality oflinesfrom the case ofa subscriber having only a single line. At H is shown the first andlastline relay, and at 12 is shown the busy relay.

Referring further'to Fig. 3,. whenthe digits dialed are received, therotation relay 4 is actuated and closed by circuits not shown in thedrawing. The connectori's set in rotation over the circuit: 1 1

Ground (regular positive battery), winding and breaker, contact Rl5,wire B in the stages preceding the connector, contact T33, cam e inposition 7 MR, R62, T44, negative regular battery.

When the connectorpasses onto the called line of the called subscriber,the control relay 6 is energized over the circuit:

Positive terminal of insulated battery, winding of relay 6, combinercontact 01, bank a of numerical element X6 in the, position of the unitsdigit, contact C in position 1 of the connector,

winding of relay l, contactRM, wire S, contact T32,'negative terminal ofthe insulated battery. Contact stubs B of connector COI are connected toa ground through resistors Rl to R6 when the corresponding linesarefree. I They are connected to a ground through resistances having adifierent value when thecorrespondinglines are busy or disconnected; 1;

The test relay '5 is actuatedinoperated posio duri al o th seer at onswh n 9 3- cs sm l ne s. tr e ever h c c t;

winding ofrelay 5, negative regulanbattery,

t Ground (positive regular battery) acontactTlB.

.fW hen the control relay}. is energized, the upper nector, contact.- R!l, wiren, contact- T31, combiner contact (111,; relay contactTM-,;wiriding of relay 5, T62, T44, negative regular battery.

In this case of iree line, no shunt takes. place] on this circuit, andthe relay5 has its two windingsbala-nced. Since the-two windings ofrelay 5v are connected-to oppo qeach other, relay 5 releases, whichaction. characterizes a free line...

,the .called line is busy, the communication being handledhasapplied a.busy polarity on e c n Thr-th ihr shof the onn ct r employed. Thiscausesa shunt on the circuit of the up er winding of test relay-.5. 7Test relay 5 is not then balanced and-gremainsin operated position. I Uv 'Busy relay 1.2: then has sufiicient time to be energized over thecircuit: a 7

Ground (positie regular battery), winding of relay l2, relay contactRIM, combiner contactb1, relay contact T43, T51, T61, negativeregularbattery. If the lineis the first of acontinuous group oii lines, relay ll is energized over the circuit:'. r

Positive terminal of insulated battery, winding of relay H, relaycontact R12, Rl03, TIZZ, contact and brush S of the connector, relaycontact T2l, winding of relay I, wire S, relay icon: tact T32 andnegative'terminal or insulated. battery. As the current passes throughthe noninductive resistance of relay H, the current which flows throughmarginal. relay l is not strong enough to energize it;

Relay 10 is energized over the circuit-i Ground (positive terminal ofregular battery), relay contact ,TI23,ITII 4, winding of relay l0,negative'regular battery;

The relay H releases again, its actuating cir cult being opened at relaycontact RIU3'.

Relay l2 releases, its energized circuit being opened at'relay contact.RIM, and no longer finds a circuit, since, in'releasing, relay ll" hasopened its contact Till. I

The sequence switch or combiner of the registerpasses on topositiongthroughthecir'cui't':

Ground'(positivetpole (if-regular battery), re-' lay 'contactTHIBfRlH,combiner contact 111., combiner breaker and'winding R, andne'gative'regular-battery?j "f On combiner position 8; the connector resumes itsrotation under the controlof thetest' relay by virtue of the-circuit?Ground (positive terminal of regular battery), breaker and winding, wireB,-T33", RIIZ, THJZ, combiner contact-c8, relay contact T43, TM; T6 I,negative-regular battery.

In the case of Fig. 3, it has been assumed that lines 2, 3,. 4, were onsuccessive positions, while line 6 is isolated from the previouslymentioned group, by mterveningposition 5... J i r In positions 2 and 3,thc control relay 6 is held ,by' virtue of. the circuit:

"Positive terminal of. the insulated batteryr Gon trol rel'ayt,relaycontact. R13, R84, R94,, Tlll4, "ReIayS isnot'energized. f 1

one of the'two' lines 2 or 3' isiree, the test relay 5 is balanced andreleases.

Connector relay '1 is energizedover the circuit:

the. c rcuit:

a aiaa Ground (positive termi alof regular battery) relay I,contact'lfl, 35LT6 t, negative'regular a t ry- I .The connectorisstopped, its energizing circuit being opened at T5l..

Relay I. of the connector is energized over the r ui ]?ositiv.e;terminal: ,ofi 'the insulated.v battery. winding of relay 6, contactT14:,.'Tl0 9,'-contact and brush S of the connector, relay contact.-T21,

winding of relay 1, relay contact RM, wire S,.

T32, negative terminal of the insulated battery. Relay l. closesitsfholdin'g contact I2 before contact M, is opened (makebefore-breakcontact).

The connector is connected and the wires are extended toward thecalledsubscriber.

If neither of the lines '2. or 3 is. free. the connector arrivesinposition i.

At this position the group relay 9. is energized over the circuit: v

Positive terminal of the insulated battery. winding oi relay 9, relaycontact. R92, THIS,

combiner contact dB", bank I) of numerical. element X5 in position 4,,contact and'brush S in position 4 of: the. connector, relay contact TZI,

lower winding of relay I, relay contact RM, wire S, T32, negativeterminal of the insulated battery. The resistance of the lower windingof relay 9 is sufficiently great so that marginal relay l is notoperated. L f

Relay 9 is held by'virtue of the circuit: 7 Ground (positive terminal ofregular battery) relay contact T9l, winding. of relay 9, negativeregular battery.

The control relay "6' isthen' held by virtue of Positive terminal of theinsulated battery. winding of relay 6- contact T13, relay contact T93,TIDE, combiner contact d8, bank (1 of numerical element X5, contact andbrush 5 of the connector, relay contact T21, winding of relay I, RM,wire S, relay contact T32, negative terminal of the insulated battery.

The holding circuit on positions 2 and 3 is opened at relay contact R94.

The rotating circuit of the connector stepping magnet is notchanged andremains under: the control of the test relay 5.

If the line in position 4' is free, the test relay 5 releases. Theconnector is. stopped and connector relay 1- is energized by virtue ofthe circuit The line wires are then extended toward the calledsubscriber.

'If the line 4 is busy, the connector" continues its r.otation.-, Onposition 5, the control'relay 6-- releases, which prevents the line frombeing taken even if it is free, because the test relay 3 is no longer incircuit, itscircuitbeing open at relay contact T62, and theeonnectorldoes not stopon position 5.

#The connector continues to rotate by virtue of- .the continuity oi thecircuit:

and the relay l becomes energized over the cirbrush S of the connectorin position-6, relay TZI;

winding of relay 1, RM, wire S,'T32, negative terminal of insulatedbattery. I y

The circuit for rotation of the connector is opened'at relay contactR1125 The control relay 6 is energized by virtue of thecircuit:

Positive terminal of-"the insulated battery, winding of relay 6 contactT73, relay contact Tl ll, negative terminalof the insulated battery.

The test relay 5'is energized by virtue of clos-" ing of relaycontact'TBl'. j

If'the line '6 is free, the test relay 5 releases. j The connector relay1 visf'energized by virtue of the circuit: r

Ground (positive terminalof the regular battery) winding of'relay 1,relay contact T42, RSI, TBI, negative regular battery.

The resistance of relay II is short-circuited by relayc'ontact'fTH,and'relay I is energized over the'circuitz" Positiveterm'in'al orinsulated battery, wind-' ing of relay ll, relay contact T12, TIN, TIN,T95, bank C of numerical element X5, contact and brush S in position 6,relay contact TZL' winding of relay I, RM, wire S, relay contact T311, 7negative terminal of the insulated battery.

If the line '6 is busy, the'test relay 5 remains operated, and busyrelay [2 is energized over the circuit: a

Ground (positive terminal of the regular battery), winding of busy relayl2, relay contact Tlll, Tlfll, combiner contact b8, relay contact T43,T5l, Tfil, negative terminal of the regular battery. 1' j Relay I2 isthe busy relay of the register ERI. When it is energized it causes thesending of the busy signal to the calling subscriber by cir- I cuitsnotcoming within the scope of the present invention. a I a If, in thesame decade of lines,'there is a second subscriber having isolated, orseparated lines insorted between the, lines of; the first mentionedsubscriber, then, when passingonto the last grouped line of the secondsubscriber, the wire S is no longer connected to relay 9, but to an:other similar relay 8, by a similar circuit, .taking a path through thebank a of numerical element X5 instead of through the bank d. Thisarrangement makes it possible to have in each decade two 'subscribersh'aving isolated lines, that is, twenty subscribers per hundred. Ifthisnum v her is considered insuflicientjit can be increased inaccordance with the present invention, by

the addition of a third relay such as, 8 and ,9

and supplementary banks on numerical element X5. Similarly, passing onto reach the last line causes the cuit:

energization of relay ll over the cirg Positive terminal of insulatedbattery, winding of relay 1 I, relay contact Tl03, R95, T85,'bank e ofnumerical element X5, contact and brush of CO-l, relays l and 2,: RM,vwire S, contact T32, negative terminal 0f;i,n$1.118 ted1battery. 1

In the embodiment shownin Fig. 3, it is possible to have an unlimitednumber of subscribers, all of whose linesare grouped, the arrangementaccording tofthe present invention only cominginto use whenthesubscriber has one or more lines isolated or' s'e parated from eachother.

In fact, the embodiment of the invention according to the arrangement ofFig. 3, makes, it possible tohave an unlimited number of subscriberswith several lines when the'several lines are consecutively numbered, onthe condition that there is no other line inserted between those of agroup. Thisassumes a control wire of an intermediate line, common to allthe groups,

(wiresmultipled on positions 2'and 8 of Fig. 3)

and used when neither of the relays 8 and 9 has operated. Similarly,-there is a last-line wire (wire DL of Fig; 3) common to all of thegroups.

'4 represents another embodiment in accordance "with the presentinvention. This embodimentof Fig.- 4;nakes it possible to reduce thenumber of control wires between the connectors and the registers.

The embodiment of Fig. 4- makes it possible to eliminate the two wireswhich have been mentioned, that is, the control wire of an intermediateline, common to all of the groups, and the last-line wire DL, as justmentioned for Fig. 3.

In Fig. 4 there are found again, the same elements as in Fig. '3'. ,Inparticular,'there are found again the connector COI, and also thecontacts of bank S corresponding to any six positions which, however,must'be consecutive.

Position "1; corresponds to the first-line of a groupnffl y I Position 2a'nd'position4 correspond to the second and-third-line ofa group. p

Positions 3 and 5 correspond to lines not belonging to the desiredgroup. that is, they belong :the same reference characters.

When the connector arrives on the line in position 2,1thelast line ofthe consecutive group, the relay! is je'nrgi'zed over the circuit:

Positive (terminal of the "insulated battery,

- winding ofgrelay. 9, relay contact R92, Ti 06, combiner contact'd8,bank b of numerical element X5 in position 4, contact and brush S of theconn'ector in position '2,relay contact T21, winding of relay I, RM.wire S, T32, negative terminal of the insulated battery.

Relaysis heldby virtueofthe circuit:

Ground (positive terminal of theregular bat- I tery) relay contact T9!winding of relay 9, negative regularv battery.

- Thecontrolrelay-S- is held by virtue of the clrcuit: i

Positive terminal of I the insulated battery,

winding of relay 6,-relay contact T93, Tl 06,'combiner contact d8, bankI; of numerical element =X5, contact and brush'S of the. connector inposition 2, relay contact T2 I, winding of relay 1, RM, wire S, T32,negative terminal-of the insulated battery. I 1 f '7 If the lineis free,the test relay 5.:releases.

tinues to rotate by ea er 9 The connector relay'l is: energized over thecircuit: I

Ground (positiveterminal oiregular battery),

winding of relayl,relay contactf'lfl, B5], Iii,

cuit:

Ground v n winding andbreaker, I relay ,.contact T33, R l l2, flffl 02negative regular battery.

Referring further to Fig. a; w n s-'3 which is then nextreachedcorresponds to a line which serves anothersubscriber. I In thisposition 3, contactj s oftheconnector has not made connection. Thecontrol reposane terminal r regain; battery) relay c act RIE, wire B, enew by 6 is no longer held and releases. The .test

relay is no longer in circuit, since'its energizing circuit has beenopened at relay contact TBLand the connector continues'to rotate byvil'fbuefof the circuit:' 2.:

Ground (positive'terminal oi regularbattery) winding and breaker, Bi 5,Wire. B, relay contact T33, RI I2, 1102 combiner contact c8,relaycontact R62, T44, negative regular battery."

When the connector reaches position ,4, co'rresponding to a line servingthe given subscriber,

the control relay6'is again energized bu er the circuit: V

Positive terminal of the insulated "battery, winding of control relay 6,,rela contact T93, THIS, combiner contactdil bank b oi numerical elementX5, contact and brush slot .the connector in position 4,,relay contact'T2.l winding of relay I, relay contact BM, wirels' relay contact T32,negative terminal of the insulatedbattery.

The test-relay 5 ,is'again placed circuit and energized by relay contactT62, and thelineis tested. .3 If the line' 44s; busy the-connectorcontinues its rotation. I

When position 5*is reachedwhich isassigned to another subscriber, thesituation is as on pcsitionv 3, and the control relay 6 releases, andthe line cannot be taken. i L

The connector, therefore,'-continues toirotate and arrivesin position 6'corresponding to the last of'the lines which serve the called subscriberunder consideration. w v

When this position 6 is reached, :the last line relay H isenergized-ove'r-the circuit: 1

Positive terminals? of the insulated battery, windingof lastlineifrelayHicont'act R12, relay contact T 1.03, T9 5'; bank'Ct or the numericalelement X5, contact and brush S ofthe-..c'onnector, relay contactTflywinding of relay l',1relaycontact RM, "wire S, relay contact 1132;,negative terminal of the 'insulatedibatteryw 1 The rotationofthe'connectoriis' stopped by the opening of relay contactRl i2 oflastlinerel'ay l I.

- The slow-a'cting *busy relay-1'2 is-placedin circuit 'and is'energized over the circuit?- Ground (positive tenninalfof:regularjbattery) theinsulatedv battery.

.from '1 to 12, and respectively correspond winding of relay I, relaycontact T42, Bil, Tfii,

negative regular'battery.

The relay l of the connector (30-! is energized circuit: p

Positiveterrninal of the insulated battery,

winding of relay l I, relay contact T12, Ti 13, TI 03,

T95, bankC of numerical element X5, contact and brush'S of the connectorin position 6, relay contact T2 i, winding of relay 1, relay contactRHl,wire S, relay contact T32, negative terminal of The line wiresv areextended to the called subscriber, the call is setup, and the registercan be If the lines is busy, the test relay 5 does not release. Busyrelay l2 has time to become energized. This relay I2 is the busy relayof the register ER-L, The closing of busy relay [2, causes the busysignal to. be sent to the calling subscriber, by circuits known in theart, ,which do not form a part of the present invention.

If the number dialed by the calling subscriber were the number of anyother line than the first numbered line, assigned to the calledsubscriber, such as the line in position 4, for example, then, in casethe line so called is busy," the group. relay 9 does not close and thehuntingv for another free line does not takeplace. l V

Similarly, if it is desiredjto assignadditi'onal lines to anothersubscriberwhosejisted number lies within the same decadain, ordertopreyent the mixing up of .the lines'o'f thescjtwo subscribers, becauseof the fact-{thatthe decade numericalelemcnt X5 is in the same positionfor both of these two subscribers, it v.is necessary to use a secondgroup relay which will then be energized and closed instead. of grouprelay 9, .and

which second group. relay isdesignated relay 8 in Figs. Sand ,4.'Ihehunting of the intermediate lines and of the last line "forthis'second subscriber having a plurality of lines, is then performed bymeansof banks d,-and,e of.lthe tens .ment according tovthe-presentinvention, and

which can be applied to a system withspecial marking multiple, which isindividual for. each marking device, in accordance with theblockdiagramof Fig. 2, which shows the'RB type of system. In the arrangementshown in Fig. 5,, the choice of the group of lines is effected bymeansof the numerical element-receiving the units digits. 1

, Only the connector CO2 and the control switch C002 of Fig.2, havebeen. shown in Fig; 5..

. Only twelve successive positions of theconnector CO2 have been shown,which. are num-bered to t following lines: Y I

Position 1: First line of the decade in which the called number islocated." T 4 'f Position 2: Isolated line not belong ng c any 'group 1Position 35 First line of the grouper the called group of linesbel'ong'ing to-i the called subscriber. Positions 4', 5,7, 9', 1'0;Intermediate lines belonging to'the called group of lines of the calledsubscriber. Positions 8', 12: Isolated line or lines belonging to othergroups of other-subscribers,

It. is further. provided in the arrangement of Fig. 5, that thehuntingfor a free connector is efiected by the wire T, the holding bythe wire A, and that .the dialing impulses are received in the form ofbattery impulses on the wire B.

When the connector is taken, the relay I9 of Fig. is energized in serieswith the relay I3 over the circuit:

Ground (positive regular battery) on the wire A, relay contact RI4I ofrelay I4, winding of relay I3, winding, of relay I9, negative regularbattery.

Relay. H of Fig. 5 is energized over the circuit:

Ground (positive regular battery), relay contact TI 92 of relay I9, bankC in normal rest position of switch CC, winding of relay 2|, negativeregular battery.

When the subscriber dials, the impulses are received on relay 20 overthe circuit:

Ground (positive regular battery), relay contact T2 of relay 2|, windingof relay 2!), relay contact TI38' of relay I3, relay contact RI44, wireB. v v v The switch advances by virtue of the completion of the circuit:

Ground (positive regular battery), relay contact T2III of relay 20,winding of switch CC, negative regular battery. i

When the sending of the dialing impulses has been finished, the relay 2Ireleases, because the normal rest position of theflbank Cis blocked, andthe second'winding of relay 2I is short-circuited for a relatively longtime interval by relay contact R2! of relay 20. g r

The connector begins to rotate by virtue of the completion of thecircuit:

Ground (positive regular battery), bank C in engaged position of switchCC, relay contact R213 of relay 2|, RI82, RI5I, TI35, RI43, breaker andwinding CR, negative regular battery.

When. the connector passes onto the first line of the decade whichcontains the called sub,- scriber, which in thecase shown in Fig. 5, isassumed to be'the fourth decade, the relay !5 is energized by virtue ofthe circuit:

. Ground (positive regular battery), relay contact TI 33 of relay I3,wire C, bank a of switch CC in position 4, winding of relay I5, negativeregular battery.

The rotationof the connector is stopped by the openingof contact RI5I,and the relay l8 (Fig. 5) is energized by virtue of the circuit:

Ground (positive regular battery), bank C,

relay contact R2 I3 of relay 2 I, RI82, TI5I, bank sf b of switch CC,winding of relay I8, negative regular battery.

Switch CC comes into the intermediate rest position by virtue ofcompletion of the circuit:

v Ground (positive regular battery), bank C of switch CC, relay contactR2I3 of relay 2 I, TI82,

RI", breaker and-winding CC, negative regular battery. 7

r The relay 2| is again energized by virtue of the same circuit asbefore described for its first described.

the position 4 on its several banks 0, d, e, f, g.

the relay I5 'is energized upon passing ontothe line by virtue of thecompletion of the ;circuit:

.' Ground.(positive regular-battery), relay contact TI33 ,of relay I3,wirezC. bank d, relay contact R22I, winding of relay I5,-negativeregular battery. I 1" x The relay --I6 is energized over-the circuit;

Ground (positive: regular battery), bank- C of switchCC, relay contactR2 I3,RI82,;TI5 I, bank a, winding ofrelay I6, 'negativeregular battery.

The test circuit is completed and if the lineis free,the-relay I4 isenergized :over, the circuit:

Ground (positive -regular;;battery), bank .0, relay'contact R213 ofrelay-2I, RI82, .Tl6l, resistance on relay I6, relay contact RI'H ofrelay l7, TI32, winding of relay -;I4 wire T, resistance and battery inthe subscribers station equipment. .i I

The relay I4 completea'at its contacts TI4I, TI42, TI44, in actuatedposition, the. continuity of the wires of the selector leading'to thesubscribers station, and releases the controlswitch by opening itscontact RI4I- If thecalled subscriber is .busy, the potential on contactT of, the called subscriber is modified by the call which is then inexistence thereon, and the relay I4 is not energized;

Further, if the .line inquestion isthe firstofa group of lines, therelay 22 .is energized by virtue of the circuit: 4 i

. Ground (positive regular battery),frela y contact TIM of relay I3,wire S, windingof relay'22, negative regular battery.

The .relay22 is held closed by virtue of the circuit:. j, H

Ground (positive regular battery), relay contact TI92 of relay I9, T222,winding of relay 22, negative regularbattery.

The control relay'IS opens by virtue of the openingof relay contact R22Iof relay 22. The

connectorresumesits rotation by-virtue of completion of the circuitwhich has already been When the connector passes onto a line belongingto the same subscriber, the test circuit is completed over the circuit:

Ground (positive regular battery) relay contact TI54 of relay I5, wire|S, bank of switch CC, resistance on relay I6, relay contact'RI'II,TI32, winding of relay I4, wire T, resistance, and negative regularbattery.

If the line in question is free, the relay I4 is energized, stoppingtherotation of the connector by opening relay contact RI43, -and providesthrough the circuits, as already described, the continuity of the wiresto the subscriber, and the release of the control switch.

If the line in question is busy, the relay I4 remains in its normal restposition, andthe rotation continues. 1

In order'to cause the rotation to stop, it is necessary for theconnector to be on a position corresponding to a free line and also forth'ewire S to be connectedto the bank ,1 on the position correspondingto'the last digit (theunits digit) of the number. dialed by the callingsubscriber.

When the-connector reaches the last line corresponding to the calledsubscriber, the relay I5 is energized by virtue of the completion of thecircuit: 1

Ground (positive regular battery), relay contact TI34, of relay I3, wireS, bank 6 of switch CC, relay contact T22I of relay 22, winding'of relayI5, negative regularbattery.

The rotation of the connectoris stopped by the opening of relay contactRIBI of -relay l5.

The relay I6 is energized over the circuit:

Ground (positive regular battery), bank C, relay contact R213 of relay21, R182, Tll, bank 9, winding of relay 16, negative regular battery.

The test circuit is completed through:

Ground (positive regular battery), bank C of switch CC, relay contact R2l3 of relay 2|, RIBZ, TIBI, resistance on relay l6, relay contact RI'H,T132, winding of relay l4, wire T. If this last line is busy, the relayi4 is not energized and the relay I! has time to close.

This operation causes the sending back of an impulse to the stages aheadof the connector, which brings about therelease and return of the busysignal to the calling subscriber by the usual means forming a part ofeach plant.

When there are located on the banks of the connector, severalsubscribers with several lines interspersed, and whose units digits arethe same, it is necessary to installseveral relays, such as the relay22, each of these additional relays corresponding to one of thesesubscribers whose listed number'thus ends in the same units digit. Eachof these additional relays puts into service a set of banks such as thebanks 0 and J, as shown in Fig. 3. 7

It will be apparent to those skilled in the art that my invention issusceptible of modifications to adapt the same to particular conditions,and all such modifications which are within the scope of the appendedclaims, I consider to be comprehended within the spirit of my invention.

Having thus described the invention, what is claimed is:

1. In a selection device for an automatic telephone or telegraph systemcomprising private branch exchanges a principal regular general batteryfor an exchange, a register comprising a marking switch for registeringthe units digits of the called subscriber, an auxiliary separateinsulated battery individual to each said register, a main control relayand an auxiliary control relay; a connector having a first row ofcontrol terminals, a second row of control terminals and two wipershaving the same orientation and simultaneously hunting over said rowsrespectivea marking wire for connecting a terminal of said first row ofcontrol terminals to a terminal of a first row of terminals of saidmarking switch; a connection between one pole of said anxiliary separatebattery and said wipers hunting over said two rows of control terminals;a connection between the wiper moving over said first row of terminalsof said marking switch and the other pole of said auxiliary separatebattery through the winding of said main control relay; a marking wirefor connecting a first terminal of said second row of control terminals,having the same orientation as said terminal of said first row, to saidsecond pole of said auxiliary separate battery through the winding ofsaid auxiliary control relay; in the register, means for energizing saidrelay when the subscribers line corresponding to said first terminal ofsaid second row is busy and means for bringing about the release of saidrelay and the continuation of the hunting of said connector wipers.

2. A selection device according to claim 1 comprising: in said registera tens digit control re- 14 lay and a tens digit marking switch having afirst row of terminals, a first and a second additional row of terminalsover which respectively move two wipers having the same orientation asthe wiper moving over said first row of terminals of said switch; aconnection between a second terminal of said second row of controlterminals and the terminal of said first additional row which has thesame orientation as said terminal of said first row of said switch, saidsecond terminal of said second row of control terminals lying, withrespect to the hunting direction of said wipers of said connector behindsaid first terminal of said second row; a connection between the wiperof said first additional row and said second mentioned pole of saidauxiliary separate battery through the winding of said tens digitcontrol relay, whereby said relay is energized when said wipers of saidconnector pass over said second terminal; a connection between aterminal of said second row of control terminals which lies at least asfar as said second terminal from said first terminal and the terminal ofsaid second additional row of terminals of said marking switch which hasthe same orientation as said terminal of said first additional row; anda connection between said wiper moving over said second additional rowand said second mentioned pole of said auxiliary separate batterythrough the winding of said auxiliary control relay and a make contactof said tens digit control relay, whereby said auxiliary control relayis actuated when said wipers of said connector pass over said lastmentioned terminal of said second row.

3. A selection device according to claim 2 comprising: a second tensdigit control relay; a third and a fourth additional row of terminals insaid marking switch, the wipers moving over said third and fourth rowsrespectively having the same orientation as said wipers moving over saidfirst and second additional rows; a third and a fourth terminal in saidsecond row of control terminals; and connections between said third andfourth control terminals, said third and said fourth additional rows ofterminals, said second tens digit control relay, a make contact of saidrelay and all the other elements recited in claim 2 except said firstand second control terminals, said first and said second additional rowsof terminals, said first tens digit control relay and its make contact,said connections being identical with those recited in claim 2 withrespect to said first and second terminals of said second row of controlterminals.

HENRI LOUIS LESIGNE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,597,784 Gardner Aug. 31, 19261,694,623 Ostline Dec. 11, 1928 1,716,986 Stehlik June 11, 19291,799,175 Merk Apr. 7, 1931 1,891,423 Kahn Dec. 20, 1932 2,190,140Taylor Feb. 13, 1940

